Throttle-lever



No. 624,294. 4 Patented May 2, I899. L. W. CANADY.

THROTTLE LEVER.

(Applicatioh filed Dec. 28, 1898.) (No Model.) 2 Sheets-Sheet I.

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No. 624,294. Patented May 2, I899.

L. W. CANADY.

THROTTLE LEVER.

(Applicaticn filed Dec. 28, 1898.) (No Model.) 2 Sheets-Sheet 2.

WITNESSES T INVE/VTOH BY g ATTORNEYS.

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UNITE STATES PATENT OFFICE.

LORIN WVINFIELD CANADY, OF EL PASO, TEXAS.

TH ROTTLE-LEVER.

SPECIFICATION formingpart of Letters Patent No. 624,294, dated May 2, 1899.

Application filed December 28, 1898 Serial No. 700,514. (No model.)

To all whom it may concern.-

Be it known that I, LORIN WINFIELD CAN- ADY, of El Paso, in the county of El Paso and State of Texas, have invented a new and Improved Throttle-Lever, of which the following is a full, clear, and exact description.

This-invention relates to a throttle-lever adapted particularly for locomotives and constructed so that the valve may be readily opened and closed or held at any desired intermediate position.

This specification is the disclosure of one form of the invention, while the clai ins define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a-partial end elevation of a locomotive-boiler having my invention applied thereto. Fig. 2 is a partial plan View of the same. Fig. 3 is an enlarged plan view of the invention with parts broken away and in section, and Fig. 4 is a sectional elevation on the line 4 4 in Fig. 3.

The invention is applicable to locomotives of all types and may be arranged in various positions, according to the build of the 1000- motive, without in any way departing from the spirit of the invention. In the present instance I have shown it applied to the top of the boiler at a point forward of the boilerhcad. It is obvious, however, that the position may be changed Without in any degree aifecting the essential parts of the invention.

Fastened to the boiler is a plate 5, to which is jointed a link 6, which has a hand-lever 7 pivoted to its rear end. Pivoted to the lever 7 is the stem 8 of the throttle, which stem in the action of the valve slides through the usual gland 9. The lever 7 is provided with a longitudinally-extending slot 10, the inner end of which is formed with two angularlydisposed walls 11, and extending transversely of the lever 7 and through the slot 10 is a quadrant 12, the ends of which are adjustably fastened to the boiler by means of bolts 14. The quadrant 12 is curved in the arc of the circle in which the lever 7 swings and has its inner edge formed with a V-bevel fitting snugly against the angularly-disposed walls 11 at the inner end of the slot 10. Fulcrumed in the slot 10 on a pin 15 is a camlever 16, which presses against the outer edge of the quadrant l2 and which serves to force the beveled inner edge of the bar against the Walls 11 of the slot 10, thus locking the bar with the lever to prevent the movement of the lever. The quadrant 12 has its ends slotted to receive the bolts 14, so as to permit a slight movement of the quadrant 12 toward and from the Walls 11. The quadrant 12 is supported at its ends on blocks 24, fastened to the boiler, one of which blocks is shown in Fig. 4. By these means the quad rant is held at the proper elevation above the boiler.

The cam-lever16 extends out of the slot 10 and longitudinally of the lever 7 toward the free end thereof. The free end of the lever 16 is pivoted to two links 17, which lie one on each side of the lever 7 and which in turn are connected with a finger-lever 18, fulcrumed on an offset 19 of the hand-lever 7, the two levers 7 and 18 terminating at the same point, so that the engine-driver may grasp both levers to manipulate the lever 18 previously to throwing the lever 7 The cam-lever 16 is pressed normally against the quadrant 12, so that the lever 7 is held normally locked by means of an expansive spiral spring 20, fitted in a cavity 21, formed in the hand-lever 7. Screwing in said cavity 21 is a threaded pin 22, held by a jam-nut 23, by which to regulate the tension of the spring 20.

Having thus described myv invention, I claim asnew and desire to secure by Letters Patent 1. The combination of a hand-lever having a slot therein, the slot having two angularlydisposed walls at one end thereof, a quadrant loose in the slot of the lever and having a double-beveled edge adapted to engage with the angularly-disposed walls of the slot, and means for forcing the quadrant into such engagement.

2. The combination of a lever having two angularly-disposed walls formed thereon, a quadrant mounted transversely to the lever and having a double-beveled edge bearing against the angularly-disposed walls thereof, the quadrant being movable toward and from said walls, and means for forcing said bar into engagement with said walls.

3. The combination. of a hand-lever having a slot therein, a quadrant passed loosely through the slot, a cam mounted on the handlever and serving to engage the quadrant to lock the same with the hand-lever, the handlever having a cavity formed therein, an expansive spring fitted in said cavity and hearing against the cam, a screw mounted in the hand-lever and engaging the spring to regulate the tension thereof, and means on the hand-lever for moving the cam.

4. The combination of ahand-lever, a quadrant passed loosely through rhe slot in the hand-lever, a cam-lever mounted in the slot and having a portion extending out of the slot longitudinally with the lever, two links pivotally connected with said portion of the cam 

